摘要:

Physical reasoning suggests that aerodynamic sound from free flows may be attributed to local fluid dilatation coupled with local fluid accelerations, the former acting like a simple source field and the latter like a dipole field which reduces to a quadrupole field. A supporting mathematical development is given; it discloses the formal need of an additional surface integral. The rather poor convergence of the integrals is discussed and comparison is made with theories which rest on the dilatational effect alone.

ISSN:0001-4966    

DOI:10.1121/1.1908582

出版商:Acoustical Society of America    

年代:1961

数据来源: AIP

摘要:

A brief comparison of intonation and tone languages is given, with criteria of the latter applied to observed whistle contours appearing in underwater recordings ofTursiops truncatusandLangenorhynchus obliquidens.

ISSN:0001-4966    

DOI:10.1121/1.1908584

出版商:Acoustical Society of America    

年代:1961

数据来源: AIP

摘要:

A re‐examination of some data previously obtained by C. R. Elliott indicates that the absolute disruptive effect of delayed auditory feedback (DAF) is greater the greater the contextual constraint in a passage, and the more rapidly the passage is read under normal control conditions. The easier the reading task, the greater is the impairment in performance under DAF.

ISSN:0001-4966    

DOI:10.1121/1.1908586

出版商:Acoustical Society of America    

年代:1961

数据来源: AIP

摘要:

A study was designed which considered the effects of two sets of printed instructions upon oral reading rate. The first set explicitly required one group of subjects to attempt to read a series of sentences naturally, while the second set explicitly required another group of subjects to attempt to communicate the meaning of the sentences to the experimenter as they read them. Statistical treatment of the data revealed that those subjects instructed to “read to communicate” required significantly more time to read a series of sentences than those subjects instructed to “read naturally.”

ISSN:0001-4966    

DOI:10.1121/1.1908588

出版商:Acoustical Society of America    

年代:1961

数据来源: AIP

ISSN:0001-4966    

DOI:10.1121/1.1908590

出版商:Acoustical Society of America    

年代:1961

数据来源: AIP

摘要:

A backward‐sloping ultrasonic wave is generated by reflection of a finite amplitude distorted wave from a pressure‐release boundary. The difference between the behavior of this wave and that of a wave distorted in the usual sense is demonstrated.

ISSN:0001-4966    

DOI:10.1121/1.1908592

出版商:Acoustical Society of America    

年代:1961

数据来源: AIP

ISSN:0001-4966    

DOI:10.1121/1.1908594

出版商:Acoustical Society of America    

年代:1961

数据来源: AIP